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Not all celebrities love social media.

In fact, there's a good amount of Hollywood stars who've said goodbye to their followers are actually quit Twitter (whether permanently or temporarily).

Most recently, Keira Knightleyrevealed that she once secretly joined Twitter under a fake name only to permanently delete her account 12 hours later. "It made me feel a little bit like being in a school playground and not being popular and standing on the sidelines kind of going, 'Argh,'" she explained.

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